VoxTRUNK is the network capacity that has to be purchased in order to receive calls on VoxDID or Vox800 numbers. Each channel allows for one concurrent call. VoxTRUNK channels can be managed in a very flexible and efficient way at global level.

Channels are available in 4 different zones : zone A, B, C and World. Each zone A, B and C groups multiple countries around the world. Call capacity in each zone can be shared by VoxDID and Vox800 phone numbers from countries within the respective zones. Within these zones, Voxbone allows customers to create virtual groups of numbers and to limit their capacity usage. This feature, known as Capacity Groups, allows customers to define the maximum number of concurrent calls amongst numbers belonging to that group.